From the Virginia Department of Emergency Management:
We can’t stress enough the importance of having an emergency supply kit in your car, friends! As always, the best-case scenario is to stay off the roads during a winter storm. But if travel is essential, keep these items with you, such as:
Jumper cables
Flares or reflective triangle
Ice scraper
Car cell phone charger
Blanket
Map
Cat litter or sand (for better tire traction)
And more: https://bit.ly/3I51BxM